... 2.Copper Conductor 3.With good shielding 4.PVC insulation TVVF-F2 PVC insulation and underground telephone cable1,For indoor detencion dincendie2.4 ... . The most important thing, it is oil-proof, damp-proof and safe anti-acid-base cable.Technical data: About us:Our ... are approved by ISO, CCC, CE, CB,VDE,SONCAP and so on. Product line:Package: TVVF-F2 PVC insulation and underground telephone cable